Beryllium has how many valence electrons in its last ring?

1 Answer
Jan 9, 2015

Beryllium is located in both the second group, and the second row of the periodic table, which gives it an atomic number of 4 and a total number of 4 electrons. Its electron configuration is

#"Be":1s^(2)2s^(2)#, or using the noble gas shorthand notation,


Valence electrons are defined as the electrons capable of forming chemical bonds with other atoms, and are lcoated in the outermost shell of the atom. As its electron configuration shows, #"Be"# has 2 valence electrons located in the 2s subshell.

These electrons give #"Be"# a +2 oxidation state and the ability to form 2 covalent bonds.